NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Traditional navigation by slide rule
From: Gary LaPook
Date: 2016 Nov 14, 06:23 +0000
From: Gary LaPook <NoReply_LaPook@fer3.com>
To: garylapook@pacbell.net
Sent: Sunday, November 13, 2016 9:43 PM
Subject: [NavList] Re: Traditional navigation by slide rule
From: Gary LaPook
Date: 2016 Nov 14, 06:23 +0000
And, to state the obvious, if the destination is east of you, and the destination latitude is the same as the starting point, then the rhumb line course is 090 degrees true; if to the west then 270 degrees true.
gl
From: Gary LaPook <NoReply_LaPook@fer3.com>
To: garylapook@pacbell.net
Sent: Sunday, November 13, 2016 9:43 PM
Subject: [NavList] Re: Traditional navigation by slide rule
Sure. If your destination is generally northeast of you then Zn = Az; If your destination is generally southeast of you then Zn = 180 - Az; If your destination is generally southwest of you then Zn = 180 + Az; If your destination is generally northwest of you then Zn = 360 - Az. gl -------------------------------------------- On Sun, 11/13/16, Bob Goethe wrote: Subject: [NavList] Re: Traditional navigation by slide rule To: garylapook---.net Date: Sunday, November 13, 2016, 1:28 PM Gary, do you have azimuth-rule suggestions for rhumb line calculations? It seems likely that if I got azimuth wrong for great circle routes, I may well have gotten my rhumb line calculations wrong as well.Bob View and reply to this message
